spec: Document what happens for unrepresentable group IDs

Signed-off-by: Simon McVittie <smcv@collabora.com>

diff --git a/doc/dbus-specification.xml b/doc/dbus-specification.xml
index 0b9226b3563a6a319d5f7674623f3cee58b5eabb..d365582becadd057d3d5a59015a3df3ef54eb40d 100644 (file)
--- a/doc/dbus-specification.xml
+++ b/doc/dbus-specification.xml
@@ -6732,7 +6732,8 @@
                   group and the supplementary groups), as defined by POSIX, in
                   numerically sorted order. This array is either complete or
                   absent: if the message bus is able to determine some but not
-                  all of the caller's groups, it must not add this credential
+                  all of the caller's groups, or if one of the groups is not
+                  representable in a UINT32, it must not add this credential
                   to the dictionary.
                 </entry>
               </row>